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Proceedings Paper

Distributed optical fiber Bragg grating sensor for simultaneous measurement of pressure and temperature in the oil and gas downhole
Author(s): Xueguang Qiao; Michael A. Fiddy
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Paper Abstract

A new method of distributed fiber Bragg grating sensors with a linear CCD array demultiplexing technique for the simultaneous measurement of pressure and temperature is described. The optical source is a dual-wavelength light-emitting diode (LED). The sensing probe incorporates five pairs of double-wavelength fiber Bragg gratings along a single fiber for measuring axial pressure and temperature simultaneously in oil and gas pipelines. A linear CCD array based spectrometer is used for tracing the wavelength shift of the Bragg grating sensors. The tests were carried out in oil and gas pipelines, pressure resolution is 0. 1 Psi, and temperature resolution is 0. 1 °C .The measurement range of pressure and temperature is 0—1 OOMPa and -20—1 80 C respectively.

Paper Details

Date Published: 11 July 2002
PDF: 5 pages
Proc. SPIE 4870, Active and Passive Optical Components for WDM Communications II, (11 July 2002); doi: 10.1117/12.475573
Show Author Affiliations
Xueguang Qiao, Xi'an Petroleum Univ. (China)
Michael A. Fiddy, Univ. of Massachusetts/Lowell (United States)


Published in SPIE Proceedings Vol. 4870:
Active and Passive Optical Components for WDM Communications II
Achyut Kumar Dutta; Abdul Ahad Sami Awwal; Niloy K. Dutta; Katsunari Okamoto, Editor(s)

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